alk vs salinity?

[146clark]

My parameters are stabile for the last 3 months at
Dkh 7.2-7.5
Cal 400
Mag 1280
PO4 0.01
Salinity 1.023-1.024
Temp 78-79
Orp 400-430
Nitrate 0

[146clark]

Zeovit says a dkh of 6.5-7.5 because you want as close to nsw as possible. It is also stated that a higher dkh could potentially cause unwanted rtn, stn. Personally I've seen people run 6.5 and have beautify sps reefs while others run 12 dkh ( non zeo)and are just as nice. I have run systems at 9 dkh aswell and worked great just wondering about salinity in the 1.023-1.024 range for coral health really. I believe that as long as the alk cal mag and other crucial parameters are in line thing should go as norm? I was under the impression that lower salinity would also alow for more o2 saturation in the water column but could be wrong.

[Aquattro]

Not sure I'd even consider O2 values, if it made any difference, it would be miniscule. I can't see why a lower salinity wouldn't work if all the other values are where you want, but again, I run alk high and it never bothered me. Not sure anyone with a "successful" SPS reef has ever done this on purpose I'm sure some have, and I'd guess it could work. I dunno

[reefwars]

if you want to drop alk in salt mix its quite easy to do before even adding it to your system , again using the salinity values to monitor parameters like cal and alk is going to be impossible to do as every bucket of salt is different then the one before slightly and some drastically

you have to realize that salt alone almost always never keep alk and cal in check for mature tanks unless the tank is tiny and changes are large , in a heavily stocked hard coral tank with lots of coraline youll have to do about %50 per day to keep levels stable....thats not really a good way of doing it unless money is no object lol even then the jumps are not healthy either.


if you don't have corals im not sure why your worried about rtn on acros?


are you going ULNS?

[146clark]

I'm not worried about rtn or stn at this moment as this system has no corals. As for cal and alk ect those will not be supplied by water changes I will dose with an automated system as all my systems are. The only question is the salinity for an sps dominate ok at 1.023-1.024? Has anyone done this with any luck? Or does everyone just run 1.025-1.026 because that's what the salt manufacturers give there parameter quotes at

[Aquattro]

Salt manufacturers recommend crap all over the map. The water on reefs is 1.026 which is why we use that value. I still don't quite grasp why you're insisting in using less? If you have to maintain everything else via dosing, what is the value?

[146clark]

There is no value just curiousity. I appreciate everyone's comments